Hello Kopano Team,
what does the error message tell me?
Do I have to enter something in the PHP.ini or in the .htaccess file?

23/01/2018 09:01:25 [22778] [ INFO] [xxxx@xxxxx]IpcSharedMemoryProvider->initSharedMem(): PHP libraries for the use shared memory are not available. Check the isntalled php packages or use e.g. the memcache IPC provider.

23/01/2018 09:02:33 [23229] [ERROR] [unknown] SimpleMutex not available as InterProcessData is not available. This is not recommended on duty systems and may result in corrupt user/device linking.

23/01/2018 09:02:33 [23229] [ERROR] [unknown] SimpleMutex not available as InterProcessData is not available. This is not recommended on duty systems and may result in corrupt user/device linking.
Zpush version 2.3.8 backend Zimbra Release 67